CycleSync vs RYTEX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CycleSync
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Умный календарь менструаций с точными прогнозами. Алгоритм анализирует историю ваших циклов для предсказания даты следующих месячных с высокой точностью. Отмечайте начало и конец цикла, интенсивность выделений и любые отклонения от нормы. Калькулятор овуляции и фертильности. Отслеживайте наиболее благоприятные дни для зачатия с помощью точного расчёта окна фертильности. Визуальные индикаторы помогут легко ориентироваться в календаре. Подробная статистика и аналитика. Просматривайте историю циклов, анализируйте регулярность и отслеживайте средние показатели. Приложение покажет среднюю длину цикла и продолжительность менструации. Отслеживание симптомов и самочувствия. Четыре уровня интенсивности выделений, множество симптомов для отслеживания, базальная температура для точного определения овуляции и личные заметки для каждого дня. Режим беременности. Подсчёт недель беременности, расчёт предварительной даты родов, визуальные индикаторы по триместрам. Уведомления о цикле отключаются автоматически при начале отслеживания беременности. Умные уведомления и напоминания. Напоминание о менструации за один до пяти дней до начала. Напоминание об овуляции за один до трёх дней до овуляции. Ежедневное напоминание отметить день в выбранное время. Напоминание о приёме таблеток в установленное время.
RYTEX
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Know Your Rhythm. RYTEX is a private, ad-free period and cycle tracker. Your health data lives on your device — always. TRACK YOUR CYCLE • Period & ovulation predictions • Symptom tracking (mood, cramps, energy, sleep and more) • Daily & monthly cycle insights • Irregular cycle support PLAN AHEAD See your predicted period dates for the next 3 and 6 months. Plan your vacation, your important days, your life — without surprises. PARTNER SHARING • Share your cycle privately with your partner • Sharing starts only with your invitation and their explicit acceptance • End-to-end encrypted — no one can read it, not even us • You control what they see, and you can stop sharing anytime TRULY PRIVATE • Your health data stays on your device • Anything you share is end-to-end encrypted • No ads. Ever. • No data selling. Ever. • No account required to start HEALTH INSIGHTS • Science-based cycle analysis • PMS & ovulation pattern detection • Doctor report export (PDF) SPARK Something your partner can send you. Something you can send back. Only visible when you open the app. No content in the notification, just a generic alert. Some things don't need words. DISCREET BY DESIGN All notifications are private. No period dates. No symptom details. No cycle info. Just a gentle nudge — nothing more. Your health is yours alone. RYTEX PREMIUM Partner sharing, SPARK and the doctor report are part of RYTEX Premium (monthly or yearly subscription). One subscription covers you both: premium for either partner is enough. Cycle tracking, predictions, symptoms and insights are always free. Apple Health: RYTEX can import your past Menstrual Flow records from the Health app (read-only) so you keep your history when switching from another period tracker. Settings → Data Transfer → Import from Health. — MEDICAL DISCLAIMER RYTEX is not a medical device and does not provide medical advice, diagnosis, or treatment. It is not a diagnostic tool and must not be used as contraception. Predictions and insights are for informational purposes only. Always seek the advice of a qualified healthcare professional in addition to using this app, and before making any medical decisions or changing your treatment. Terms of Use (EULA): https://rytex.app/terms Privacy Policy: https://rytex.app/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: CycleSync at none against RYTEX's 2. CycleSync also leads on update cadence (every 2 days vs weekly). RYTEX's advantage is iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. RYTEX sells 2 in-app purchases, starting at $4.99 per month. CycleSync asks for nothing beyond the download.
CycleSync ships an update every 2 days, RYTEX weekly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | CycleSync | RYTEX |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 52 MB |
| Age rating | 17+ | 12+ |
| Developer | Sergei Antropov | Omer Dulger |
In-app purchases
CycleSync
No in-app purchases
RYTEX
- Premium Monthly$4.991 Month
- Premium Yearly$34.991 Year









